18729911088 has 120 divisors (see below), whose sum is σ = 59974137600. Its totient is φ = 5345315712.

The previous prime is 18729911077. The next prime is 18729911089. The reversal of 18729911088 is 88011992781.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18729911089) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 916243 + ... + 936461.

It is an arithmetic number, because the mean of its divisors is an integer number (499784480).

Almost surely, 2^18729911088 is an apocalyptic number.

18729911088 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18729911088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29987068800).

18729911088 is an abundant number, since it is smaller than the sum of its proper divisors (41244226512).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18729911088 is a wasteful number, since it uses less digits than its factorization.

18729911088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21159 (or 21150 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 54.

The spelling of 18729911088 in words is "eighteen billion, seven hundred twenty-nine million, nine hundred eleven thousand, eighty-eight".